Plug Types

REXTON IGNITIONS LTD.

We have had good results with NGK plugs and suggested types for some popular machines are listed below. The NGK plugs have a good heat range so the suggested type will usually perform well for most normal riding. If you have a modified motor or you are competition riding the suggested type can be a good starting point to find the best grade of plug. We have found that a plug gap of 0.030" + works well with the new BT-H magneto.

BSA	M21-M33	B6HS
	B33	B7HS
	B34 Iron head	B7HS
	B34 Aluminium head	B7ES
	B34 GS Clubman	B8ES
	B40 B44 B50	B7ES
	500-650 Twins - Later	B7ES - B8ES

Norton	250 - 400	BP7ES
	M50 - ES2	B7ES
	500 - Commando	B7ES

Triumph	3T 46-51	B7HS
	T100 early iron	B7HS
	6T iron to '60	B7HS
	T100 Aluminium to '59	B7ES
	T90 - T100 to '73	B7ES - B8ES

Velocette	MAC - MSS	B7ES
	Viper - Venom	B8ES

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Last modified: August 31, 2003